Blower



Sept. 28, 1954 B. B. CARY 2,690,294

BLOWER Filed June 2, 1949 3 Sheets-Sheet l l4 EIEEEHEF? E]- CARY @mfwATTORNEYS Sept. 28, 1954 CARY 2,690,294

BLOWER Filed June 2, 1949 3 Sheets-Sheet 2 ATTORNEYS EIEEEl-IER EL CARYSept. 28, 1954 B CARY 2,690,294

BLOWER Filed June 2, 1949 s Shets-Sheet s FIE YU l\ i 34- 42 DIPECT/QNOF H v AIR F -Q {fin :34. 42

v H J| EEECHEFRJ .E'LFARY as? W2 v ATTORNEYS Patented Sept. 28, 1954BLOWER Beecher B. Cary, Jackson, Mieh., assignor to Hayes Industries,Jackson, Mich, a corporation of Michigan Application June 2, 1949,Serial No. 96,713

1 Claim. 1

This invention relates to axial flow blowers as employed on automobilesfor heating or ventilating purposes and which incorporate a motor andvane assembly mounted within an air flow casing.

It is an object of the invention to provide blower apparatus of theabove described character which is of compact construction and can bereadily manufactured and assembled.

It is another object of the invention to provide a blower apparatuswhich is capable of being manufactured from sheet metal and provides forthe mounting of the motor and air fiow vane assemblies in a novel,simple, yet highly efiicient and practical manner.

Yet another object of the invention is to provide a blower apparatusembodying fixed and rotary axial flow vane assemblies which provide forthe obtaining of an idling, or non-rotary condition, in which an axialair flow is free to take place through the casing interior and the vaneassemblies mounted therein, the latter including a fixed circular seriesof vanes and a rotary vane series mounted in axial adjacent relationshipto said fixed vane series.

These and other objects and advantages residing in the combination,construction and arrangement of parts will be more apparent from aconsideration of the following description with reference to the drawingand the annexed claim.

In the drawings:

Fig. I is a side elevational view of one form of the invention,

Fig. II is a longitudinal section of Fig. I,

Fig. III is a section on the line IIIIII of Fig. I,

Fig. IV is a side elevational view of a modified form of the invention,

Fig. V is a longitudinal section of Fig. IV,

Fig. VI is a section on the line VIVI of Fig. V,

Fig. VII is a perspective View of the motor housing and combined guidevane and mounting structure employed in the previously described figuresand forming an important part of this invention,

Fig. VIII is a perspective view of one of the fixed guide vanes of thesaid mounting structure, and

Fig. IX is a diagrammatic plan view showing the assembled fixed endcasings and the central rotor casing with an adjacent pair of vanestherein and the general relative angular and curved shapes which theyassume and present to the axial flow of air.

Referring to the drawings, and first to Figs.

I, II and III, the blower construction illustrated therein comprises anouter tubular casing indicated generally at 10, which is convenientlyformed from sheet metal formed into shape and jointed in any convenientmanner, as by turning over and rolling, as indicated at [2 in Fig. I11,said casing being shown fitted with exterior lugs M, by which the bloweris capable of being mounted as a unit upon a suitable part of a motorvehicle body or framework but which mounting means may take other formsand constructions to suit particular requirements and conditions.

The outer casing I9 forms an air flow duct, with the air flow takingplace in the direction of the arrow A seen in Fig. I, and accommodatesin co-axial alignment a fixed motor casing, a rotor and an end casingindicated generally at l4, l5 and 18 respectively, all of which areconcentrically mounted with respect to the outer casing and define anannular air flow space 29 along which the air flow is constrained totake place by the action of the rotor (6, when in rotation, or which airflow can take place freely by a natural draft or suction effect due tothe particular formation and arrangement of the fixed and rotary vaneassemblies, described later.

Both the motor casing Hi and the end casing l8 are of identical form andare shown as provided with dome-shaped nose ends 22, 22' which, with thecylindrical walls 24, 24' and the central cylindrical rotor casing wall26, combine to form a stream-lined inner casing assembly. Also, both themotor casing it and the end casing iii, are fitted with external vaneassemblies each of similar construction and composed of acircumferentially spaced series of vane elements, indicated generally at28. The construction thereby involved is seen also in Figs. VII andVIII, where the casing part is taken to be the motor casing l4, althoughthe end casing I8 is of identical construction but has no motor housedtherein, the casing l4 being shown in Figs. I and II as fitted with anelectric motor 30 having a central shaft 32 upon which the rotor it ismounted for its rotation by this motor.

Referring now to the construction of the easing i4 and its vaneassembly, it will be seen particularly from Fig. VH and VIII, that thevane elements 23 are of identical construction and form and that eachcomprises a pair of vanes 34, 34 joined by an integral bridge 36 andhaving lugs 33 by which the vane elements are mounted as units upon theexterior surface of the casing part, each such unit being constituted bya said pair of vanes 34, 34 and bridge connection 36 and the vanes beingassembled to extend generally in the direction of the longitudinal axisof the casing so as to provide for the obtaining of the desired axialair flow characteristic. The lugs 48 are passed through suitable slotsin the casing M (or l8) and are turned overon the interior thereof toprovide for the secure mounting of these vane elements upon the casing.

It will be appreciated that the casing M can be pressed or stamped outfrom sheet metal and that the vane elements themselves can also beformed from sheet metal suitably cut and formed into shape, therebymaking for ease and relative cheapness of construction.

Each bridge piece is positioned to lie adjacent the interior surface ofthe outer casing ii! and is shaped into arcuate form to conform withsuch surface, the construction being such that the circumferentialassembly of arcuate bridge pieces combine to form a guide surface bywhich the casing and its vanes is capable of being slid endwise as aunit into the casing l and positioned for the engagement of screws 42inserted through openings in the casing it and engaged in the saidopenings All to fixedly secure and locate the unit in operativeposition.

The vane surfaces 3 5, 34' are of similar shape and formation and areformed to present curved ends 52 which are directed in the samedirection upon their casing parts H3 or 18, such as appears clear from.consideration of the diagrammatic plan view of Fig. IX, which shows anadjacent pair of these vanes on the fixed casing part It and 48 inoperative relation to an adjacent pair of rotor vanes 44. The latter areall of identical form and construction and are also conveniently alfixedin position upon the cylindrical casing part l5 of the rotor 15. byturned over lugs 45 (Fig. II).

The motor as is shown mounted within the one end casing part 22 by screwbolts 48. pro- J'ecting from the motor casing and engaged in openings indepressions 5c in, the domed casing end 22, in which depression nuts 52are accommodated to secure the screw bolts, and hence the motor, inposition and one of which nuts serves to secure an electrical terminal54 on an electrical lead 56 of a ground wire assembly, the electricalsupply being conveyed by another electrical lead, 58- connected with themotor and extending throu h a grommet fitting. to. in an opening in theouter casing It, this lead 58 being adapted for connection to the.vehicle headilight terminal blocks (not shown) for example. 7 The motorshaft 32 conveniently terminates within the end casing [8, as shown, andhas the rotor it mounted thereon for free rotation between the fixedvane assemblies. 34, 34 at each end thereof. Such mounting is shown asaccomplished by the; casing part i5 having an an nular radial end web 62supporting a bearing socket 64 in which the motor shaft end is secured,as by a grub screw 66.

The entire blower construction provides for relative ease and cheapnessof construction as well as for ease of assembly. To assemble the parts.it is merely necessary to slide the end casing IB axially alongtheinterior of the outer casing Iii until the bridge openings 40 of thevane elements on this casing. are positioned for the reception of thesecuring screws 42.. Then with the motor 30 secured upon the other endcasing M, by the screw bolts 48 and nuts 52, and the rotor 16 alsosecured upon the motor shaft 32 it is possible to slide these parts as aunit along the interior of the casing ID to position the other bridgeopenings 40 for the reception of the securing screws 62. This completesthe formation of the required blower assembly, with the end fixed vanes34, 34' and the central rotor vanes 64 defining axial air flow channelsof the shape and direction shown in Fig. IX and which provide for suchan axial air flow when the rotor is in operation or is idle. Thus themotor can be employed to deliver hot air along the interior of thecasing In by rotation of the rotor, or with the motor and rotor idle thecasing can be relied upon to supply cool or ventilating air by naturaldraft or suction when the vehicle, to which the blower is affixed, is inmotion.

Referring now to Figs. IV, V and VI, here the blower has only one endcasing with fixed guide vanes in association with a rotor; otherwise theconstruction and assembly is the same as with the previously describedform of the invention. In Figs. IV, V and VI the blower is shown asconstituted by an outer tube casing l0 bent out from sheet metal joinedby folding at I2 and enclosing the fixed vane structure 14' and therotor H5.

The fixed vane structure is constituted by the hollow cylindrical casing24' with the closed domed end 22 and carrying the fixed vane elements 28each of which is of substantially in verted U-form and presents adjacentspaced vanes 68, 68" and an arcuate bridge connection 70 adapted to haveguided sliding engagement with. the. interior surface of the tube casingHi, all as above. described, the vane elements 28' being convenientlybent out from a single piece of sheet metal and including the deformablesecuring lugs 38. The electric motor is indicated at 30 and: is shownsecured in the casing 22, 24 by the screw bolts 48' and nuts 52' withits shaft 32 having the rotor mounted thereon, the latter being formedby the cylindrical casing [2 having the axially directed blades 44'secured thereon by the turned over lugs 46.

The terminal block electric supply lead is indicated at 58 and theground lead at 56.

Having thus described my invention in two practical forms but withoutlimitation to the precise details thereof, what I claim as novel andwish to secure by Letters Patent is as follows:

An axial flow blower construction comprising in combination. an outertubular casing having openings therethrough at circumferentially spacedintervals for receiving securing means, a first hollow casing parthaving a closed dome shaped end and an open-ended cylindrical portion,said first hollow casing having an electric motor secured'therein with apower shaft ex tending beyond the. open end of the casing, a secondhollow casing part, said second casing part being of cylindrical shape,means mounting said second casing upon said power shaft to be co-axialtherewith and with said first casing part, with the said second andcylindrical casing part forming an extension of the cylindrical portionof said first casing part, both said casing parts being concentric withthe outer tubular casing, and means mounting said casing parts as a unitwithin said tubular casing part, said latter means comprising a seriesof similar sheet metal parts of substantially U- shape section mountedabout the exterior sur face of said first casing part incircumferentially spaced relation, each of said sheet metal parts havingaxially extending curved walls joined by an integral bridge portion withan opening therethrough registrable with the openings in said outertubular casing, the bridge portions of said sheet metal parts lying upona common cylindrical surface corresponding with the interior surface ofsaid outer tubular casing, said unit having axial sliding engagementwith the said tubular casing surface by the engagement of said bridgeportions with said surface, said second casing part carrying separateaxially eX- tending vane elements with curved surfaces forming axialextensions of the curved Walls of said sheet metal parts but ofdifierent curvature thereto, said separate vane elements havingclearance with respect to the inner surface of said outer tubularcasing.

References Cited in the file of this patent Number UNITED STATES PATENTSName Date Morin -1 Feb. 11, 1930 Jones May 8, 1934 Albertson Oct. 19,1937 Replogle Oct. 10, 1939 Jewell July 2, 1940 Troller Sept. 1, 1942McElroy Oct. 13, 1942 Hagen Jan. 19, 1943 Ponomareff Jan. 29, 1946Troller Mar. 26, 1946 Parrish Apr. 9, 1946 Reinmann Jan. 4, 1949 McElroyJan. 17, 1950 Curley Mar. 28, 1950 Sawyer Apr. 8, 1952 Anxionnaz et a1.Oct. 14, 1952

